A tank 36 ft. by 36 ft. by 6 ft. is filled with water to a depth of 5 ft. If a bulkhead is placed in the center of the tank running fore-and-aft along the 36-foot axis，how will the value of the moment of inertia of the free surface be affected?A.The momen

题目

A tank 36 ft. by 36 ft. by 6 ft. is filled with water to a depth of 5 ft. If a bulkhead is placed in the center of the tank running fore-and-aft along the 36-foot axis，how will the value of the moment of inertia of the free surface be affected?

A.The moment of inertia would remain unchanged

B.The moment of inertia would be 1/4 its original value

C.The moment of inertia would be 1/2 the original value

D.None of the above

相似考题

1.An alarm device inserted between the deaerating tank and the expansion tank can notify the on-watching crew that .A.the expansion tank is lack of waterB.the expansion tank is over flowingC.there is something wrong with the cooling systemD.there is something wrong with the engine

2.A tank has been sealed and unventilated(不通风的) for a long period of time. Which of the following conditions does this indicate?A.The tank is safe to enterB.The tank is especially dangerous to enterC.Carbon monoxide(一氧化物) is presentD.Water vapor present when the tank was sealed has oxidized(使氧化)

3.How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?A.With gooseneck ventsB.With warning signsC.With flame screensD.With pressure-vacuum relief valves

4.Tomas plans to construct a circular fishpond with a diameter of 9 ft. Which of the following is closest to the length, in feet, of the decorative fencing that Tomas needs to enclose the fishpond along its perimeter?A.15B.19C.29D.64E.255

更多“A tank 36 ft. by 36 ft. by 6 ft. is filled with water to a depth of 5 ft. If a bulkhead is placed in the center of the tank running fore-and-aft along the 36-foot axis，how will the value of the moment of inertia of the free surface be affected?A.The momen”相关问题

  • 第1题：

    Which action must be taken when an individual cargo tank is closed off from the inert gas system by the tank isolation valve?

    A.The tank must be gas freed

    B.The tank must be ballasted

    C.The tank must be vented to the atmosphere

    D.The bypass valve must also be closed


    正确答案：C

  • 第2题：

    Which statement about the free surface effect is TRUE ________．

    A.It increases in direct proportion to the length of the tank times the breadth squared

    B.It decreases at increased angles of heel due to pocketing when a tank is 90% full

    C.It decreases in direct proportion to increasing specific gravity of the liquid in the tank

    D.In practice，the correction is considered to be a virtual reduction of KG


    正确答案：B

  • 第3题：

    The free surface corrections depend upon the dimensions of the surface of the free liquids and the ______．

    A.volume of liquid in the tank

    B.displacement of the vessel

    C.location of the tank in the vessel

    D.height of the center of gravity of the vessel


    正确答案：B

  • 第4题：

    The use of portable electrical equipment in the pumproom on tank barges is prohibited unless ______．

    A.The pumproom is gas-free

    B.Spaces with bulkheads common to the pumproom are either gas-free，inert，filled with water，or contain grade E liquid

    C.All other compartments in which flammable vapors and gases may exist are closed and secured

    D.All of the above


    正确答案：D

  • 第5题：

    单选题
    Which of the following is more important in determining the amount of free surface that will be produced?（）.
    A

    The breath of the tank

    B

    The length of the tank

    C

    The amount of liquid in the tank

    D

    The position of the tank in relation to the center line of the vessel


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    The effects of free surface on a vessel’s initial stability do NOT depend upon the（）.
    A

    volume of displacement of the vessel

    B

    dimensions of the surface of the liquid

    C

    amount of liquid in slack tanks

    D

    specific gravity of the liquid in the tank


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    River currents tend to（）.
    A

    pick up speed where the channel widens

    B

    run slower in the center of the channel

    C

    hug the inside of a bend

    D

    cause the greatest depth of water to be along the outside of a bend


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    Many vessels are provided with flume tanks，which also have a dump tank located under the flume tanks. In the event the ship is damaged，you could dump the flume tanks into the dump tank which would（）.
    A

    reduce the free surface effect and raise the KG

    B

    not have any effect on free surface and raise the KG

    C

    reduce the free surface effect and lower the KG

    D

    not have any effect on free surface and lower the KG


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    The effects of free surface on initial stability depend upon the dimensions of the surface of the free liquids and the（）.
    A

    volume of liquid in the tank

    B

    volume of displacement of the vessel

    C

    location of the tank in the vessel

    D

    height of the center of gravity of the vessel


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    A vessel is equipped with cross-connected deep tanks.In which situation should the crossconnection valve be closed?（）.
    A

    The tank lie above the waterline and are filled

    B

    The tank are partically filled with dry cargo

    C

    The tanks are partially filled with liquid cargo

    D

    The tanks are filled and lie below the waterline


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    A solid metal cube of edge 3 feet is placed in a rectangular tank whose length, width, and height are 3, 4, and 5 feet, respectively. What is the volume, in cubic feet, of water that the tank can now hold?
    A

    20

    B

    27

    C

    33

    D

    48

    E

    60


    正确答案： B
    解析：
    根据题意，长方体水槽的体积为3×4×5 =60立方英尺，而立方体占的面积为 33 =27 立方英尺，所以如今水槽的储水量为 60-27 =33 立方英尺。

  • 第12题：

    单选题
    You may improve a vessels stability by （）.
    A

    keeping the fuel tanks topped off

    B

    increasing the free surface effect

    C

    keeping the fuel tanks at least half MI

    D

    keeping at least one fuel tank empty for slops


    正确答案： A
    解析： 暂无解析

  • 第13题：

    A tank containers should not generally be more than 95% full，______．

    A.to allow for possible thermal expansion of the contents

    B.to prevent dangerous surging movements in transit

    C.to increase its weight

    D.to change the free surface in it


    正确答案：A

  • 第14题：

    Inerting means ______．

    A.The introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volume

    B.The introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volume

    C.The introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargo

    D.All of the above


    正确答案：D

  • 第15题：

    The free surface effects of a partially full liquid tank decrease with increased ______．

    A.Density of the liquid

    B.Placement of the tank above the keel

    C.Displacement volume of the ship

    D.Size of the surface area in the tank


    正确答案：C

  • 第16题：

    When referring to quantity of barite in a P-tank，ullage is the ______．

    A.Distance of the barite surface above the tank bottom

    B.Percentage of barite in the tank

    C.Distance of the barite surface below the tank cover

    D.Total weight of barite in UPC（ullages per centimeter）


    正确答案：C

  • 第17题：

    单选题
    As you approach Shreves cut-off you see Red River LandingGage (302.4 AHP) which reads 4.2 feet. Which of thefollowing statements is TRUE? （）
    A

    This reading is at the same elevation as the 6.2 ft. mark on the gage at Head of Passes

    B

    A vessel drawing 8 ft would be able to pass over the sill at Old River Lock

    C

    This reading is 6.4 feet below the Low Water Reference Plane

    D

    A vessel drawing 7 ft. would be able to pass through the locks at Lower Old River


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    What is the principal danger from the liquid in a half full tank onboard a vessel?（）
    A

    Corrosion from the shifting liquid

    B

    Rupturing of bulkheads from the shifting liquid

    C

    Loss of stability from free surface effect

    D

    Holing of the tank bottom from the weight of the shifting liquid


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    To prevent loss of stability from free communication flooding you should（）.
    A

    close the cross-connection valve between the off-center tanks

    B

    completely flood high center tanks

    C

    ballast double bottom wing tanks

    D

    close any opening to the sea in an off-center tank


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from（）.
    A

    filling completely

    B

    developing free surface

    C

    developing free surface moment

    D

    collapsing


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    A tank 36 ft. by 36 ft. by 6 ft. is filled with water to a depth of 5 ft. If a bulkhead is placed in the center of the tank running fore-and-aft along the 36-foot axis，how will the value of the moment of inertia of the free surface be affected?（）
    A

    The moment of inertia would remain unchanged

    B

    The moment of inertia would be 1/4 its original value

    C

    The moment of inertia would be 1/2 the original value

    D

    None of the above


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    A change of trim may be simply defined as（）.
    A

    the change in difference between the forward and aft drafts

    B

    the sum of free communication, free surface and pocketing

    C

    the moment of inertia of the ship's waterline plane about the athwartship axis

    D

    rolling and listing


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    A rectangular fish tank has a base 2 feet wide and 3 feet long. When the tank is partially filled with water, a solid cube with an edge length of 1 foot is placed in the tank. If no overflow of water from the tank is assumed, by how many inches will the level of the water in the tank rise when the cube becomes completely submerged?
    A

    1/6

    B

    1/2

    C

    2

    D

    3

    E

    4


    正确答案： C
    解析：
    When a solid cube with an edge length of 1 foot is placed in the fish tank, it displaces a volume of water that is equal to the volume of the cube, which is 1×1×1 or 1 cubic foot. If h represents the change in the number of feet in the height of the water in the fish tank, then
    Volume of displaced water = 2×3 ×h = 1
    h = 1/6 foot
    Hence, the number of inches the level of the water in the tank will rise is 1/6 ×12 or 2.

相关内容